"Fri, 02 Jan 1970 09:21:43"

Convert date and time to unixtime.

120103

Another datetime format string at UTC

YYYYMMDD
19700102

Only TIME
09:21:43

General datetime
1970-01-02 09:21:43Z

For Database
1970-01-02 09:21:43

For HTTP1.1
Fri, 02 Jan 1970 09:21:43 GMT

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